Infrared Absorption Spectra of Aminobenzoic Acid Coordination Compounds

Abstract

Abstract Several divalent metal-aminobenzoic acid coordination compounds were prepared in aqueous solutions and their thermal analyses, magnetic moments, and infrared spectra were investigated. These coordination compounds have the structure of ML2 or ML2·nH2O and are coordinated with amino and carboxyl groups of the ligand. Metal-o-aminobenzoic acid chelates give approximately the same infrared spectra but metal-m- and p-aminobenzoic acid coordination compounds are classified into two groups by their infrared spectra. Detailed assignments for the infrared absorption bands of the metal-coordination compounds have been made by a comparison of the spectra with those of the ligand and its related compounds.